CN218091131U

CN218091131U - Pre-flushing system and toilet

Info

Publication number: CN218091131U
Application number: CN202222036463.6U
Authority: CN
Inventors: 姚平生
Original assignee: Kohler China Investment Co Ltd
Current assignee: Kohler China Investment Co Ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-12-20
Anticipated expiration: 2032-08-03

Abstract

The utility model discloses a pre-flushing system and a toilet, which comprises a spray pipe, a drain valve and a control mechanism; the drain valve is provided with a drain valve water inlet pipe, a drain valve water outlet pipe and a drain valve membrane; the water outlet pipe of the drain valve is connected with the spray pipe; when the control mechanism is in an initial state, the water drain valve membrane is in a closed state; when the control mechanism is in a trigger state, the water drain valve diaphragm is in an opening state. The utility model discloses a pre-flushing system and squatting pan, when the user uses the squatting pan, as required, before adopting the spray tube to wash, can trigger control mechanism, during warm hot water in the drain valve flowed into the spray tube, washed out the cold water in the spray tube in advance, played the cleaning action in the ceramic section of thick bamboo of squatting pan can be discharged to the cold water that washes out, when the follow-up use spray tube of user, spun water was warm hot water basically in the follow-up use spray tube, had promoted user's use and had experienced the sense.

Description

Pre-flushing system and toilet

Technical Field

The utility model relates to a squatting pan rinse-system technical field especially relates to a pre-rinse-system and squatting pan.

Background

The intelligent toilet would be equipped with a flushing system that includes a spray tube/nozzle and a water supply. When the user needs to use, the spray pipe/nozzle extends out to spray water so as to wash private parts for the user.

There is long term water in the lance/nozzle. When the user uses the water in the spray pipe/nozzle can become cold water, and the use experience of the user is influenced.

In view of the above, it is desirable to provide a pre-flush system and toilet for pre-draining cold water from the spout/nozzle.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a be arranged in with the cold water of spray tube/nozzle discharge in advance washing system and squatting pan in advance.

The technical scheme of the utility model provides a pre-washing system, which comprises a spray pipe and a drain valve;

the drain valve is provided with a drain valve water inlet pipe connected with the hot water inlet end and a drain valve water outlet pipe used for supplying hot water to the spray pipe;

the drain valve is internally provided with a drain valve membrane used for controlling the on-off of a water outlet pipe of the drain valve;

the water outlet pipe of the drain valve is connected with the spray pipe;

the pre-flushing system also comprises a control mechanism for controlling the membrane switch of the drain valve;

when the control mechanism is in an initial state, the water drain valve membrane is in a closed state;

when the control mechanism is in a trigger state, the diaphragm of the drain valve is in an opening state.

In one optional technical scheme, the drain valve further comprises a drain valve pressure relief pipe, and the control mechanism is connected with the drain valve pressure relief pipe;

when the control mechanism is in an initial state, the pressure relief pipe of the drain valve is in a drainage stopping state;

when the control mechanism is in a trigger state, the pressure relief pipe of the drainage valve is in a drainage state.

In one optional technical scheme, the control mechanism comprises a water storage valve with a water storage cavity;

the water storage valve is connected with a water storage valve water inlet pipe and a water storage valve water outlet pipe which are communicated with the water storage cavity, a water inlet control valve is arranged in the water storage valve water inlet pipe, and a water outlet control valve is arranged in the water storage valve water outlet pipe;

the water inlet pipe of the water storage valve is communicated with the pressure relief pipe of the drain valve;

when the control mechanism is in an initial state, the water inlet control valve is in a closed state, and the water discharge control valve is in an open state;

when the control mechanism is in a trigger state, the water inlet control valve is in an opening state, and the water discharge control valve is in a closing state.

In one optional technical scheme, the control mechanism further comprises a switching valve connected with the water inlet pipe of the water storage valve and the water outlet pipe of the water storage valve;

the switching valve comprises a switching valve shell with a channel and a switching shaft which is in clearance fit with the channel;

the switching shaft can alternately trigger the water discharge control valve and the water inlet control valve;

when the switching shaft is at an initial position, the switching shaft triggers the water discharge control valve, and the water discharge control valve is in an open state;

when the switching shaft is at the triggering position, the switching shaft triggers the water inlet control valve, and the water inlet control valve is in an opening state.

In one optional technical scheme, a switching shaft resetting piece for driving the switching shaft to reset to the initial position is connected between the switching valve shell and the switching shaft.

In one alternative solution, the water inlet control valve comprises a first slide valve and a first resetting piece for driving the first slide valve to reset to a closed state;

the drain control valve comprises a second slide valve and a second resetting piece for driving the second slide valve to reset to a closed state;

when the switching shaft is in the initial position, the first spool valve is in the closed state, and the second spool valve is driven to open by the switching shaft;

when the switching shaft is in the trigger position, the second spool valve is in the closed state, and the first spool valve is driven to open by the switching shaft.

In an alternative embodiment, the switching shaft is provided with a first recess for receiving an end of the first spool and a second recess for receiving an end of the second spool at intervals;

when the switching shaft is in an initial position, one end of the first spool valve is in the first recess, and one end of the second spool valve is in contact with a circumferential surface of the switching shaft;

when the switching shaft is in the trigger position, one end of the second spool valve is in the second recess, and one end of the first spool valve is in contact with a circumferential surface of the switching shaft.

In one optional technical scheme, the water inlet pipe of the water storage valve comprises a first water inlet pipe and a second water inlet pipe;

the first water inlet pipe is communicated with the drain valve pressure relief pipe and the first concave part, and the second water inlet pipe is communicated with the water storage cavity and the first concave part;

the water inlet control valve is positioned in the first water inlet pipe or in the second water inlet pipe.

In one optional technical scheme, the water storage valve drain pipe comprises a first drain pipe and a second drain pipe;

the first drain pipe is connected to the switching valve shell and communicated with the second concave part, and the second drain pipe is communicated with the water storage cavity and the second concave part;

the drain control valve is in the first drain pipe or in the second drain pipe.

In an optional technical solution, sealing rings are respectively disposed on the switching shaft at two sides of the first concave portion and at two sides of the second concave portion.

In one optional technical scheme, a water storage cavity drain hole is formed in a top plate of the water storage cavity, and a floating valve for opening and closing the water storage cavity drain hole is arranged in the water storage cavity;

when the water in the water storage cavity is stored to a preset water level, the floating valve closes the water discharge hole of the water storage cavity.

In one optional technical scheme, the water storage valve further comprises a water tank positioned above the water storage cavity, and a water floater is arranged in the water tank;

and a connecting rod is connected between the float valve and the water float, and the gap of the connecting rod penetrates through the water drainage hole of the water storage cavity.

In one optional technical scheme, the side part of the water tank is provided with an overflow pipe.

The technical scheme of the utility model also provides a squatting pan, including aforementioned arbitrary technical scheme the pre-flushing system.

By adopting the technical scheme, the method has the following beneficial effects:

the utility model provides a pre-flushing system and squatting pan, when the user uses the squatting pan, as required, before adopting the spray tube to wash, can trigger control mechanism, during warm hot water in the drain valve flowed into the spray tube, washed out the cold water in the spray tube in advance, played the cleaning action in the ceramic section of thick bamboo of squatting pan can be discharged to the cold water that washes out, when the follow-up use spray tube of user, spun water was basically warm hot water in the follow-up use spray tube, had promoted user's use and had experienced the sense.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

fig. 1 is a schematic layout view of a pre-flush system according to an embodiment of the present invention;

fig. 2 is a perspective view of the drain valve;

FIG. 3 is a cross-sectional view of the drain valve;

FIG. 4 is a perspective view of the control mechanism;

FIG. 5 is a sectional view of the first slide valve disposed in the second inlet pipe, the first slide valve being in a closed state and the second slide valve being in an open state;

FIG. 6 is a sectional view of the first slide valve disposed in the second inlet pipe, the first slide valve being in an open state and the second slide valve being in a closed state;

FIG. 7 is a cross-sectional view of a first slide valve disposed in a first inlet conduit, a second slide valve disposed in a second outlet conduit, and the second slide valve in an open position;

FIG. 8 is a cross-sectional view of the first slide valve deployed in the first inlet conduit with the first slide valve in a closed position;

FIG. 9 is an assembled view of the inlet tube of the accumulator valve, the first spool valve, the first reset member and the switch valve housing;

FIG. 10 is an assembled view of the accumulator drain, second spool valve, second reset member and switching valve housing.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1-3, an embodiment of the present invention provides a pre-flush system, which includes a spray tube 2 and a drain valve 3.

The drain valve 3 has a drain valve inlet pipe 31 for connection with the hot water inlet end 11, and a drain valve outlet pipe 32 for supplying hot water to the spout 2.

The water discharge valve 3 is provided with a water discharge valve diaphragm 33 for controlling the opening and closing of the water discharge pipe 32 of the water discharge valve.

The water outlet pipe 32 of the drain valve is connected with the spray pipe 2.

The pre-flush system also includes a control mechanism 4 for controlling the opening and closing of the drain valve diaphragm 33.

When the control mechanism 4 is in the initial state, the drain valve diaphragm 33 is in the closed state.

When the control mechanism 4 is in the activated state, the drain valve diaphragm 33 is in the open state.

The utility model provides a pre-flushing system is arranged in the squatting pan, and its mountable has hot water intake end 11 and base overflow pipe 12 on the base 1 of mount pad in the mount pad of seat device rear end. The hot water inlet end 11 is connected with a hot water pipeline to provide hot water or warm water for the toilet bowl. The hot water in the utility model is a concept relative to the cold water, the water temperature can be about 38 ℃, and the utility model is suitable for users to wash. The base overflow pipe 12 is used to drain excess water into the ceramic body of the toilet.

The pre-flush system includes a nozzle 2, a drain valve 3 and a control mechanism 4. The nozzle 2 has a spray head 21 and the nozzle 2 may be mounted on the base 1, either in front of or on the side of the seat insert. The nozzle 2 is telescopic. When the user uses the nozzle 2, the nozzle 2 extends out; in the normal state, the nozzle 2 is in a contracted state. The spray pipe 2 is connected with a water supply system of the toilet bowl, and the water supply system can supply hot water or warm water for the spray pipe 2. The nozzle 2 is of conventional construction and will not be described further.

When the user uses spray tube 2, the hot water in spray tube 2 perhaps can cool down to cold water, and direct blowout can influence user's experience.

The utility model discloses a drain valve 3 and control mechanism 4 provide the function of washing in advance for spray tube 2 to before the user uses spray tube 2, wash out the cold water in spray tube 2 through the hot water, be full of hot water in spray tube 2. When the user uses the water heater, the head 21 directly sprays hot water.

The drain valve 3 is mounted on the base 1.

The drain valve 3 is connected with a drain valve water inlet pipe 31 and a drain valve water outlet pipe 32, and the drain valve 3 is provided with a drain valve membrane 33. The water outlet pipe 32 of the drain valve is connected with the water inlet end 21 on the spray pipe 2 through a water pipe and is used for supplying hot water to the spray pipe 2. The water discharge valve diaphragm 33 can control the opening and closing of the water discharge valve outlet pipe 32 to control the water discharge valve outlet pipe 32 to supply water into the spray pipe 2.

The control mechanism 4 may be an electric control mechanism or a mechanical mechanism. The control mechanism 4 can be triggered to operate to control the opening and closing of the membrane 33 of the drain valve, and thus the opening and closing of the outlet pipe 32 of the drain valve. The control mechanism 4 can directly control the actuation of the drain valve diaphragm 33 or indirectly control the actuation of the drain valve diaphragm 33. If the control mechanism 4 is an electric control mechanism or a mechanical mechanism, a connecting rod is arranged at the output end of the electric control mechanism or the mechanical mechanism, the drainage valve diaphragm 33 is sleeved on the connecting rod, and the connecting rod drives the drainage valve diaphragm 33 to actuate. The control mechanism 4 may also actuate the drain valve diaphragm 33 by means of water pressure.

When the control mechanism 4 is in the initial state, the water discharge valve membrane 33 is in the closed state, and the water discharge valve water outlet pipe 32 is closed.

When the control mechanism 4 is in the activated state, the water discharge valve diaphragm 33 is in the open state, and the water discharge valve water outlet pipe 32 supplies hot water to the spray pipe 2 to flush out cold water in the spray pipe 2.

When the user uses the toilet, the spout 2 is in a retracted state before using the spout 2. When the user activates the control mechanism 4, the drain valve outlet pipe 32 supplies hot water into the spout 2, which fills the spout 2 to flush out the cold water in the spout 2. The water in the spout 2 can be discharged through the nozzle 21 and into the ceramic body. Because the water pressure of the water outlet pipe 32 of the drain valve is not too high, the water in the spray pipe 2 slowly flows out through the spray head 21 instead of being sprayed out.

Therefore, the utility model provides a pre-flushing system when the user uses the squatting pan, as required, before adopting spray tube 2 to wash, can trigger control mechanism 4, during warm hot water among the drain valve 3 flowed into spray tube 2, rushed out in advance with the cold water in spray tube 2, the cold water that rushes out can discharge and play the cleaning action in the ceramic section of thick bamboo of squatting pan, when user's follow-up use spray tube 2, from spray tube 2 in the spun water base all be warm hot water basically, promoted user's use and experienced the sense.

In one embodiment, as shown in fig. 1-3, the drain valve 3 further includes a drain valve pressure relief tube 34, and the control mechanism 4 is coupled to the drain valve pressure relief tube 34.

When the control mechanism 4 is in the initial state, the drain valve pressure relief pipe 34 is in the drainage stop state.

When the control mechanism 4 is in the activated state, the drain valve pressure relief tube 34 is in the drain state.

In this embodiment, the opening and closing of the drain valve diaphragm 33 is controlled by means of water pressure.

The drain valve 3 has therein an upper water chamber 35 and a lower water chamber 36. The drain valve outlet pipe 32 is installed at the top of the drain valve 3, and a circle of separating ribs 37 extending downwards are arranged at the water inlet of the drain valve outlet pipe 32. The drain valve diaphragm 33 is located between the upper water chamber 35 and the lower water chamber 36, and the drain valve diaphragm 33 has a communication hole 331.

When the pressure relief pipe 34 of the drain valve does not drain water outwards, after water in the upper water cavity 35 enters the lower water cavity 36, the water pressure in the upper water cavity 35 and the water pressure in the lower water cavity 36 are gradually balanced, the diaphragm 33 of the drain valve seals the separation rib 37, and the water outlet pipe 32 of the drain valve does not drain water.

When the drain valve pressure relief tube 34 drains outward, the water pressure in the lower water chamber 36 decreases, the drain valve diaphragm 33 moves downward away from the spacer 37, and the drain valve outlet tube 32 drains.

The control mechanism 4 is used for controlling the drain valve pressure relief pipe 34 to drain water or stop draining water, and the control mechanism 4 may be a valve structure connected to the drain valve pressure relief pipe 34.

When the control mechanism 4 is in the initial state, the drain valve pressure relief pipe 34 does not drain water, and the drain valve water outlet pipe 32 does not drain water.

When the control mechanism 4 is in a trigger state, the pressure relief pipe 34 of the drain valve discharges water, and the water outlet pipe 32 of the drain valve discharges water.

Water discharged from the drain valve pressure relief tube 34 can be piped into the base overflow tube 12 to clean the ceramic body.

In one embodiment, as shown in FIGS. 4-8, the control mechanism 4 includes a reservoir valve 41 having a reservoir chamber 411.

The water storage valve 41 is connected with a water storage valve water inlet pipe 42 and a water storage valve water outlet pipe 43 which are communicated with the water storage cavity 411, a water inlet control valve 44 is arranged in the water storage valve water inlet pipe 42, and a water outlet control valve 45 is arranged in the water storage valve water outlet pipe 43.

The water inlet pipe 42 of the water storage valve is communicated with the pressure relief pipe 34 of the water discharge valve.

When the control mechanism 4 is in the initial state, the intake control valve 44 is in the closed state, and the drain control valve 45 is in the open state.

When the control mechanism 4 is in the activated state, the intake control valve 44 is in the open state, and the drain control valve 45 is in the closed state.

In this embodiment, the control mechanism 4 adopts the water storage valve 41, which has a time delay function to prolong the drainage time of the drainage valve outlet pipe 32.

In the present embodiment, the control mechanism 4 includes a water storage valve 41, a water storage valve inlet pipe 42, a water storage valve outlet pipe 43, a water inlet control valve 44, and a water outlet control valve 45.

The water storage valve 41 is provided with a water storage cavity 411 therein, and the water storage valve water inlet pipe 42 and the water storage valve water outlet pipe 43 are respectively communicated with the water storage cavity 411. An inlet control valve 44 is installed in the inlet pipe 42 of the reservoir valve for controlling the opening and closing of the inlet pipe 42 of the reservoir valve. A drain control valve 45 is installed in the water storage valve drain pipe 43 for controlling the opening and closing of the water storage valve drain pipe 43. The intake control valve 44 and the discharge control valve 45 are alternately opened and closed.

The water inlet pipe 42 of the water storage valve is communicated with the pressure relief pipe 34 of the water discharge valve, and the two can be directly connected or indirectly connected through a pipeline.

If the intake control valve 44 and the drain control valve 45 are solenoid valves, they are controlled by an electric control mechanism in the control mechanism 4. If the intake control valve 44 and the drain control valve 45 are mechanical valves, they are controlled by a mechanical mechanism in the control mechanism 4.

When the control mechanism 4 is in the initial state, the water inlet control valve 44 is in the closed state, the water inlet valve 42 is closed, the water discharge valve pressure relief pipe 34 does not discharge water, the water discharge valve diaphragm 33 is closed, and the water discharge valve water outlet pipe 32 does not discharge water. At this time, the drain control valve 45 is in an open state, and the drain pipe 43 of the reservoir valve discharges the water in the reservoir chamber 411 to a preset low level to prepare for the next water storage. The water storage valve drain pipe 43 is communicated with the base overflow pipe 12, and water discharged from the water storage valve drain pipe 43 can flow into the base overflow pipe 12 through a pipeline to clean the ceramic body.

When the control mechanism 4 is in the trigger state, the water inlet control valve 44 is in the open state, the water inlet valve 42 of the water storage valve is opened, the water discharge valve pressure relief pipe 34 discharges water, the water discharge valve diaphragm 33 is opened, and the water discharge valve water outlet pipe 32 discharges water. At this time, the drain control valve 45 is in a closed state to store water for the water storage chamber 411. When the water is stored in the water storage cavity 411 to a preset high water level, the water does not continuously enter the water storage cavity 411 any more, and the water inlet control valve 44 is closed. In this process, the time that the water in the water storage cavity 411 is stored from the low water level to the high water level is the delay time, which can be set according to actual needs. The delay time is substantially the drain time of the drain valve outlet pipe 32. The delay time is determined by the volume of the reservoir 411 and the water flow in the inlet pipe 42 of the reservoir valve.

The height, installation manner and installation position of the inlet pipe 42 and the outlet pipe 43 of the water storage valve can be set according to actual needs, and only one or two installation manners are shown in the drawings, which does not represent that they are necessarily installed.

Preferably, the reservoir valve outlet pipe 43 is in communication with the bottom of the reservoir chamber 411 and the reservoir valve inlet pipe 42 is in communication with the top of the reservoir chamber 411.

In one embodiment, as shown in fig. 4-8, the control mechanism 4 further includes a switching valve 46 connected to the reservoir inlet pipe 42 and the reservoir outlet pipe 43.

The switching valve 46 includes a switching valve housing 460 having a passage 461 and a switching shaft 462 clearance-fitted to the passage 461. Switching shaft 462 can alternately activate drain control valve 45 and intake control valve 44.

When the switching shaft 462 is in the initial position, the switching shaft 462 triggers the drain control valve 45, and the drain control valve 45 is in an open state.

When switching shaft 462 is in the trigger position, switching shaft 462 triggers intake control valves 44, and intake control valves 44 are in the open state.

In the present embodiment, the switching valve 46 uses the switching shaft 462 to alternately activate the intake control valves 44 and the drain control valves 45.

The switching valve 46 has a vertically extending passage 461 therein, and a body portion of the switching shaft 462 is clearance fitted in the passage 461. The upper end of the switching shaft 462 is located above the switching valve housing 460 for being pressed to be triggered. When the switching shaft 462 is at the initial position, the upper end of the switching shaft 462 is at a higher position above the switching valve housing 460. After the switching shaft 462 is pushed to be triggered, the upper end of the switching shaft 462 is in a lower position above the switching valve housing 460.

The switching shaft 462 has a trigger part or a driving part for triggering the intake and

discharge control valves

44 and 45, which may be a protrusion, a recess, a telescopic element, or the like, provided on the switching shaft 462.

The reservoir valve inlet pipe 42 and the reservoir valve outlet pipe 43 are connected to the switching valve housing 460, respectively, and communicate with the passage 461. Therefore, when the switching shaft 462 is moved to the corresponding position, the triggering/driving part on the switching shaft 462 may trigger the intake control valve 44 or the drain control valve 45. After the intake control valve 44 is triggered, the intake control valve 44 opens the inlet water valve 42. After the drain control valve 45 is triggered, the drain control valve 45 opens the water storage valve drain pipe 43.

When the switching shaft 462 is in the initial position, the switching shaft 462 triggers the drainage control valve 45 to open, the water inlet control valve 44 is not triggered to keep closed, and the water storage cavity 411 is in a drainage state.

When the switching shaft 462 is pressed to the trigger position, the switching shaft 462 triggers the water inlet control valve 44 to open, the water inlet control valve 44 is not triggered to remain closed, and the water storage chamber 411 is in a water storage state.

With this arrangement, the switching shaft 462 controls the alternate switching of the water inlet control valve 44 and the water discharge control valve 45 to control the water storage and discharge functions of the water storage chamber 411.

In one embodiment, as shown in fig. 4 to 8, a switching shaft returning piece 463 for driving the switching shaft 462 to return to the initial position is connected between the switching valve housing 460 and the switching shaft 462. The switching shaft resetting piece 463 is connected between the switching shaft 462 and the top of the switching valve housing 460 for urging the switching shaft 462 to move up to the initial position for resetting. The switch valve housing 460 may be spring loaded.

In one embodiment, as shown in fig. 5-10, the intake control valve 44 includes a first spool valve 441 and a first restoring member 442 for restoring the first spool valve 441 to a closed state.

The drain control valve 45 includes a second spool 451 and a second restoring member 452 for restoring the second spool 451 to a closed state.

When the switching shaft 462 is in the initial position, the first spool valve 441 is in the closed state, and the second spool valve 451 is driven to open by the switching shaft 462.

When the switching shaft 462 is in the trigger position, the second spool valve 451 is in the closed state, and the first spool valve 441 is driven to open by the switching shaft 462.

In this embodiment, the water inlet control valve 44 and the water discharge control valve 45 both adopt a mechanical slide valve structure, which is as follows:

as shown in fig. 9, the intake control valve 44 includes a first spool valve 441 and a first restoring member 442. The first spool valve 441 is slidably mounted in the fill valve inlet tube 42. A first through hole 4601 is provided on the switching valve housing 460, and the water storage valve inlet pipe 42 is connected to the first through hole 4601 so as to communicate with the channel 461. One end of the inlet pipe 42 close to the first through hole 4601 has a first stopper portion 423, and a seal ring may be disposed on the first stopper portion 423 as needed.

The first slide valve 441 includes a first slide valve main body 4411 having a relatively thick thickness and a first slide valve slide bar 4412 connected to the first slide valve main body 4411, the first slide valve slide bar 4412 extending toward the first through hole 4601 and being passable through the first through hole 4601. A first step 4413 is formed at the junction of the first spool slide 4412 and the first spool body 4411. When the first spool valve 441 is in the closed state, the first step 4413 is sealed in contact with the first stopper 423, thereby closing the storage valve inlet pipe 42.

The first reset piece 442 is connected to the first spool valve main body 4411 for driving the first spool valve 441 to move toward the switching valve housing 460 side so that the opened first spool valve 441 can be automatically reset to the closed position. The first restoring member 442 may be a spring.

As shown in fig. 10, the drain control valve 45 includes a second spool 451 and a second restoring member 452. The second spool 451 is slidably mounted in the reservoir valve drain pipe 43. A second through hole 4602 is provided on the switching valve housing 460, and the reservoir valve drain pipe 43 is connected to the second through hole 4602 so as to communicate with the channel 461. One end of the water storage valve drain pipe 43 near the second through hole 4602 is provided with a second stopper 433, and a seal ring may be disposed on the second stopper 433 as necessary.

The second spool valve 451 includes a thicker second spool valve body 4511 and a second spool valve slide bar 4512 connected to the second spool valve body 4511, the second spool valve slide bar 4512 extending toward the second through hole 4602 and being passable through the second through hole 4602. A second step 4513 is formed at the connection of the second spool slide 4512 and the second spool body 4511. When the second spool 451 is in the closed state, the second step 4513 contacts and seals the second stopper 433, thereby closing the storage valve drain pipe 43.

The second returning element 452 is connected to the second spool valve body 4511 for driving the second spool valve 451 to move toward the switching valve housing 460 side so that the opened second spool valve 451 can be automatically returned to the closed position. The second restoring member 452 may be a spring.

When the switching valve 46 is in the initial position:

under the action of the first resetting member 442, the first sliding valve sliding rod 4412 extends into the channel 461 through the first through hole 4601, the first stepped portion 4413 contacts and seals the first stopper 423, and the first sliding valve 441 closes the water inlet pipe 42 of the water storage valve, so that water is not supplied to the water storage chamber 411.

The trigger/drive portion of the switching shaft 462 is in contact fit with the second slide valve slide bar 4512 of the second slide valve 451, and pushes the second slide valve slide bar 4512 to retreat from the channel 461 against the acting force of the second restoring member 452, so that the second stepped portion 4513 is separated from the second stopper portion 433, the water storage valve drain pipe 43 is opened, and the water storage chamber 411 can drain water.

When the switching valve 46 is in the activated position:

the trigger/driving portion of the switching shaft 462 is in contact fit with the first spool slide bar 4412 of the first spool valve 441, and pushes the first spool slide bar 4412 to be backward facing from the channel 461 against the acting force of the first reset piece 442, so that the first stepped portion 4413 is separated from the first stopper portion 423, the water inlet valve 42 is opened, and the water storage chamber 411 can store water.

Under the action of the second reset piece 452, the second slide valve slide bar 4512 protrudes into the channel 461 through the second through hole 4602, the second step 4513 is sealed in contact with the second stopper 433, the second slide valve 451 closes the water storage valve drain pipe 43, and the water storage chamber 411 does not drain.

In one embodiment, as shown in fig. 5 to 8, the switching shaft 462 is provided with a first recess 4621 for receiving an end portion of the first spool valve 441 and a second recess 4622 for receiving an end portion of the second spool valve 451 at intervals.

When the switching shaft 462 is in the initial position, one end of the first spool valve 441 is positioned in the first recess 4621, and one end of the second spool valve 451 is in contact with the circumferential surface of the switching shaft 462.

When the switching shaft 462 is in the trigger position, one end of the second spool valve 451 is located in the second recess 4622, and one end of the first spool valve 441 is in contact with the circumferential surface of the switching shaft 462.

In this embodiment, the switching shaft 462 is provided with a first recess 4621 and a second recess 4622 at intervals, and the first recess 4621 and the second recess 4622 may be annular grooves provided on the switching shaft 462. The first recess 4621 is adapted to receive an end portion of the first spool valve 441, and the second recess 4622 is adapted to receive an end portion of the second spool valve 451.

When the switching shaft 462 is in the initial position, the first recess 4621 is aligned with the first through hole 4601, and the end portion of the first spool valve 441 (i.e., one end of the first spool valve slide bar 4412) is inserted into the first recess 4621 through the first through hole 4601. At this time, the first stepped portion 4413 is sealed in contact with the first blocking portion 423 by the first restoring member 442, and the first spool valve 441 closes the reservoir inlet pipe 42.

When the switching shaft 462 is at the initial position, the second recess 4622 is misaligned with the second through hole 4602, and the end portion of the second spool valve 451 (i.e., the end of the second spool slide bar 4512) leaves the second recess 4622 and comes into contact with the circumferential surface or the convex portion of the switching shaft 462, thereby forcing the second spool valve 451 to compress the second restoring member 452 and causing the second stepped portion 4513 to be separated from the second stopper 433, and the second spool valve 451 is opened, opening the drain valve drain pipe 43.

When the switching shaft 462 is in the trigger state, the first recess 4621 is misaligned with the first through hole 4601, and the end portion of the first spool valve 441 (i.e., the end of the first spool valve slide bar 4412) leaves the first recess 4621 and comes into contact with the circumferential surface or the convex portion of the switching shaft 462, thereby driving the first spool valve 441 to compress the first restoring member 442 and causing the first stepped portion 4413 to be separated from the first stopper portion 423, the first spool valve 441 is opened, and the reservoir valve water inlet pipe 42 is opened.

When the switching shaft 462 is in the activated state, the second recess 4622 is aligned with the second through hole 4602, and an end portion of the second spool valve 451 (i.e., an end of the second spool slide bar 4512) is inserted into the second recess 4622 through the second through hole 4602. At this time, the second step 4513 is brought into contact with and sealed with the second stopper 433 by the second restoring member 452, and the second spool 451 closes the drain pipe 43 of the water storage valve.

In one embodiment, as shown in fig. 4 and 7-8, the inlet pipe 42 of the water storage valve comprises a first inlet pipe 421 and a second inlet pipe 422.

The first water inlet pipe 421 is communicated with the drain valve pressure relief pipe 34 and the first concave portion 4621, and the second water inlet pipe 422 is communicated with the water storage cavity 411 and the first concave portion 4621.

The water inlet control valve 44 is in the first water inlet pipe 421 or in the second water inlet pipe 422.

In this embodiment, the first recess 4621 serves as a water chamber. The inlet pipe 42 of the water storage valve includes a first inlet pipe 421 and a second inlet pipe 422, and the switching valve housing 460 is connected between the first inlet pipe 421 and the second inlet pipe 422. The first water inlet pipe 421 communicates with the drain valve pressure relief pipe 34, and the first water inlet pipe 421 also communicates with the first recess 4621. One end of the second inlet pipe 422 communicates with the water storage chamber 411, and the other end thereof communicates with the first recess 4621.

When the water inlet control valve 44 is opened, water in the drain valve pressure relief pipe 34 may enter the water storage chamber 411 through the first water inlet pipe 421, the first concave portion 4621 and the second water inlet pipe 422.

As shown in fig. 5-6, the water inlet control valve 44 may be disposed in the second water inlet pipe 422. In this structure, the water flow direction of the inlet water is opposite to the action direction of the first reset element 442, and the first reset element 442 is required to provide a large elastic force to overcome the water pressure of the inlet water, so as to prevent the first sliding valve 441 from being flushed by the water flow, and to ensure that the first sliding valve 441 can be closed.

Preferably, as shown in fig. 7 to 8, the water inlet control valve 44 is disposed in the first water inlet pipe 421. In this structure, the flow direction of the inflow water is the same as the acting direction of the first restoring member 442, and the first restoring member 442 acts on the first spool valve 441 together with the pressure of the inflow water, so as to maintain the first spool valve 441 in the closed state.

In one embodiment, as shown in fig. 4-7, the reservoir valve drain 43 includes a first drain 431 and a second drain 432.

The first drain pipe 431 is connected to the switching valve housing 460 and communicates with the second recess 4622, and the second drain pipe 432 communicates the reservoir chamber 411 and the second recess 4622.

The drain control valve 45 is in the first drain pipe 431 or in the second drain pipe 432.

In this embodiment, the second recess 4622 serves as a water chamber. The reservoir valve drain pipe 43 includes a first drain pipe 431 and a second drain pipe 432, and a switching valve housing 460 is connected between the first drain pipe 431 and the second drain pipe 432. The first drain pipe 431 is connected to the switching valve housing 460, and the first drain pipe 431 communicates with the second recess 4622. One end of the second drain pipe 432 communicates with the reservoir chamber 411, and the other end thereof communicates with the second recess 4622.

When the drain control valve 45 is opened, water in the reservoir chamber 411 may be discharged through the second drain pipe 432, the second recess 4622 and the first drain pipe 431. The first drain tube 431 may communicate with the base overflow tube 12 to drain water into the ceramic body for flushing.

The drain control valve 45 may be disposed in the first drain pipe 431. In this configuration, the direction of the discharged water flow is opposite to the action direction of the second restoring member 452, and the second restoring member 452 is required to provide a large elastic force against the water pressure of the incoming water to prevent the second spool 451 from being flushed by the water flow, so as to ensure that the second spool 451 can be closed.

Preferably, as shown in fig. 5-7, the drain control valve 45 is disposed in the second drain pipe 432. In this structure, the discharged water flows in the same direction as the second restoring member 452, and the second restoring member 452 acts on the second spool 451 together with the water pressure of the discharged water, so as to maintain the second spool 451 in a closed state.

In one preferred embodiment, the water inlet control valve 44 is disposed in the first water inlet pipe 421, the water outlet control valve 45 is disposed in the second water outlet pipe 432, and the closing directions of the water inlet control valve 44 and the water outlet control valve 45 are consistent with the water flow direction at the corresponding positions, so that the acting force of the resetting piece can be reduced, and the sealing can be realized.

In one embodiment, as shown in fig. 5-8, the switching shaft 462 is provided with sealing rings 464 on two sides of the first concave portion 4621 and two sides of the second concave portion 4622, respectively, so as to improve the sealing performance and ensure that the water in the first concave portion 4621 and the second concave portion 4622 does not flow out through the passage 461.

In one embodiment, as shown in fig. 5-6, reservoir chamber 411 has a reservoir chamber drain 413 on top plate 412, and reservoir chamber 411 has a float valve 415 therein for opening and closing reservoir chamber drain 413.

When the water is stored in the water storage chamber 411 to a preset level, the float valve 415 closes the water storage chamber drain hole 413.

In this embodiment, a float valve 415 is disposed in the water storage chamber 411 to automatically open and close the water storage chamber drain hole 413. When the water storage cavity 411 stores water to a preset water level (high water level), the floating valve 415 floats upwards and closes the water storage cavity drain hole 413, the pressure relief water in the drain valve pressure relief pipe 34 stops entering the water storage cavity 411, the drain valve diaphragm 33 is closed, and the drain valve drain pipe 32 automatically stops draining.

After the drain control valve 45 is opened, the water in the reservoir chamber 411 is drained, and the float valve 415 falls to open the reservoir chamber drain hole 413.

In one embodiment, as shown in FIGS. 4-6, the reservoir valve 41 further includes a water tank 414 above the reservoir 411, the water tank 414 having a water float 416 disposed therein.

A connecting rod 417 is connected between the float valve 415 and the water float 416, and the gap of the connecting rod 417 passes through the water storage cavity drainage hole 413.

In this embodiment, a water tank 414 is disposed above the reservoir 411 for accommodating a water float 416. The water float 416 is large in volume and buoyancy. The water float 416 is connected to the lower float valve 415 by a linkage 417 to help move the float valve 415 up to seal the reservoir drain hole 413.

In this embodiment, the water in the reservoir 411 is always full, the water level changes in the reservoir 414,

when the float 416 rises a predetermined distance in the water tank 414, the float 416 moves the float valve 415 upward to seal the reservoir drain hole 413.

In one embodiment, as shown in FIGS. 4-6, the side of the trough 414 has an overflow tube 418, and water flowing from the overflow tube 418 can flow through a conduit into the base overflow tube 12 to clean the ceramic body.

An embodiment of the present invention provides a toilet seat, comprising the pre-flush system of any one of the aforementioned embodiments. The pre-flush system may be installed in the seat assembly of a toilet.

According to the needs, the above technical schemes can be combined to achieve the best technical effect.

What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for a person skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the scope of the present invention should be viewed.

Claims

1. A pre-flush system comprising a spray tube and a drain valve;

the drain valve is internally provided with a drain valve membrane used for controlling the opening and closing of a drain pipe of the drain valve;

the water outlet pipe of the drain valve is connected with the spray pipe;

when the control mechanism is in an initial state, the drainage valve diaphragm is in a closed state;

when the control mechanism is in a trigger state, the water drain valve diaphragm is in an opening state.

2. The pre-flush system of claim 1, wherein the drain valve further comprises a drain valve pressure relief tube, the control mechanism being connected to the drain valve pressure relief tube;

3. The pre-flush system of claim 2, wherein the control mechanism comprises a reservoir valve having a reservoir chamber;

when the control mechanism is in an initial state, the water inlet control valve is in a closed state, and the water outlet control valve is in an open state;

when the control mechanism is in a trigger state, the water inlet control valve is in an open state, and the water outlet control valve is in a closed state.

4. The pre-flush system of claim 3, wherein the control mechanism further comprises a switching valve connected to the reservoir inlet pipe and the reservoir outlet pipe;

the switching valve comprises a switching valve housing with a channel and a switching shaft in clearance fit with the channel;

when the switching shaft is in an initial position, the switching shaft triggers the water discharge control valve, and the water discharge control valve is in an open state;

5. The pre-flush system of claim 4, wherein a switching shaft reset is connected between the switching valve housing and the switching shaft for driving the switching shaft to reset to an initial position.

6. The pre-flush system of claim 4, wherein the inlet control valve includes a first spool valve and a first reset member for actuating the first spool valve to reset to an off state;

the drain control valve comprises a second slide valve and a second resetting piece for driving the second slide valve to be reset to a closed state;

when the switching shaft is in an initial position, the first spool valve is in a closed state, and the second spool valve is driven to open by the switching shaft;

7. The pre-flush system of claim 6, wherein the switching shaft is provided with a first recess for receiving an end of the first spool and a second recess for receiving an end of the second spool at intervals;

8. The pre-flush system of claim 7, wherein the water retention valve inlet conduit comprises a first inlet conduit and a second inlet conduit;

9. The pre-flush system of claim 7, wherein the water retention valve drain comprises a first drain pipe and a second drain pipe;

the drain control valve is in the first drain pipe or in the second drain pipe.

10. The pre-flush system of claim 7, wherein sealing rings are disposed on the switching shaft on both sides of the first recess and on both sides of the second recess, respectively.

11. The pre-flush system according to any one of claims 3-10,

the top plate of the water storage cavity is provided with a water storage cavity drain hole, and the water storage cavity is internally provided with a floating valve for opening and closing the water storage cavity drain hole.

12. The pre-flush system of claim 11, wherein the water reservoir valve further comprises a water reservoir above the water reservoir chamber, the water reservoir having a water float disposed therein;

and a connecting rod is connected between the float valve and the water float, and a gap of the connecting rod penetrates through the water drainage hole of the water storage cavity.

13. The pre-flush system of claim 12, wherein a side of the tank has an overflow pipe.

14. A toilet bowl comprising the pre-flush system of any one of claims 1-13.